eareckson



(No Model.)

H. B. EAREOKSON.

GAS CHECK FOR WASTE PIPES.

No. 390,761. Patented Oct. 9; 1888.

ATTORNEY,

UNITED STATES PATENT @EEic HENRY B. EAREOKSON, OF NEW YORK, N. Y,

GAS-CHECK FOR WASTE-PIPES.

SPECIFICATION forming part of Letters Patent No. 390,761, dated @ctoher9, 1888.

Application filed April 24, 1888.

To aZZ whom it may concern.-

Be it known that I, HENRY B. EAREUKSON, of the city, county, and Stateof New York, have invented a new and useful Improvement in Gas-Checksfor Waste-Pipes, of which the following is a full, clear, and exactdescription.

This invention relates to an improvement in that class of appliancesused on the wastepipes of wash-basins and other water-fixtures to permitthe discharge of the waste-water, while automatically preventing thebackflow of sewer-gas, in which a self-closing flap-valve is arranged tobe opened by the pressure of the waste water to allow the same to pass,and to be closed tightly upon its seat by thepressure ofgas from thedrain.

The object of my improvement is to secure greater simplicity andefficiency than has been heretofore generally attained in appliances ofthe kind; and the invention consists of a novel construction ofgascheck, substantially as hereinafter fully described, and asdistinctly claimed.

Reference is to be had to the accompanying d rawings, forming a partofthis specification,in which similar letters of reference indicatecorresponding parts in all the figures.

Figure l is a sectional elevation of a gascheck constructed inaccordance with my in ventiou, and Fig. 2 is an inverted sectional planview of the said gas-check on the line x :r of Fig. 1.

In constructing the gascheck thus illustrated, a cylindrical box, A, isformed with an external thread, B, extending its entire length, with aneccentric circular concave valve-seat, O, in its bottom, openingdownward and surrounded by an annular step, I), and with a funnel-shapedbasin, E, in its top, opening downward through the center of thevalveseat 0.

A. circular flap-valve, F, having a hollow spherical body tittedaccurately to the seat 0, and a continuous annular flange, G, likewiseadapted to the annularstep D, is formed on one side with a hinge lug, H,projecting downward and outward from the flange G, and said hinge-lug ispivoted to swing vertically in a downward and outward opening recess, J,which is formed inan extension, K, of the box A, threaded externally tocorrespond therewith, and projecting downward therefrom out side thevalve-seat O.

The recess J is extended upward in the box above the valve-pivot, andthe hinge-lug His formed with a flat top adapted to set up evenlyagainst the bottom shoulder, A, of the box at the inner side of therecess J when the valve is closed, a segmental corner, H adapted to workclosely against the shoulder A when the valve swings onits pivot, andwith an outward-projecting arm, H, which is permitted to swing upwardinto the recess J, against the inner wall of the same, when the valve isopened.

From the outer end of the lug-arm H is sus pended, by a chain, L, aweight, M, of sufficient gravity to overbalance the valve and hold thesame normally closed against backpressnre, while permitting it to openand relieve an accumulation of water therefrom, and the bottom of thearm H which is curved so as to work in close proximity to the outside ofthe recess K, is formed with a central longitudinal groove, 0, toreceive the chain L when the arm swings upward;

On opposite ends of the threaded box A are screwed short pipe-sections MM which may be contracted at their outer ends and threaded forconnection with the respective adjoining parts of a wastepipe.

WVith this construction the valve will normally be tightly closedagainst back-pressure of gas, while yielding readily to waterpressurefrom above, as described.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1.. In a gas-check for waste-pipes, the combination, with the body A,provided on the under side of its bottom with a valve-seat, 0,

having the annular step D, and the downward- .projecting and recessedextension K, of the valve F, having a spherical body fitting thevalve-seat,and the flange G, fitting the annular step, and provided withthelug H, pivoted in the recess of the said lug, and having the projecting arm H, the weight M, and the chain L, connected to the said armand weight, substantially as described.

ICO

2. A gas-check for waste-pipes, consisting of the externally-threadedbox A, having a funnel-shaped opening, E, through the same, thevalveseat O, the annular step D, surround- 5 ing the valve-seat, thedownward-projecting extension K, and the recess J, the valve F, providedwith the flange G, and the lug H, having the projecting and grooved armH,

the Weight M, and the chain L, connected to the weightand arm,the saidbox being adapted [o to be screwed into the ends of pipe-sections,substantially as herein shown and described.

HENRY B. EAREOKSON. Vitnesscs:

JOHN OVERBEOK, JAMES HAYDEN.

